docker buildkit opencv编译

Question

我有一个Dockerfile来编译opencv很长一段时间。最近，我决定试用buildkit (用于交叉编译)。但是，使用buildkit，opencv编译失败。有以下错误：

#9 130.0 [ 87%] Linking CXX shared library ../../lib/libopencv_imgcodecs.so
#9 130.5 [ 87%] Built target opencv_imgcodecs
#9 130.5 [ 87%] Generating src/moc_window_QT.cpp
#9 130.5 [ 87%] Generating qrc_window_QT.cpp
#9 130.5 standard input:0: Note: No relevant classes found. No output generated.
#9 130.5 RCC: Error in '/opencv/modules/highgui/src/window_QT.qrc': Cannot find file 'files_Qt/Milky/48/28.png'
#9 130.5 make[2]: *** [modules/highgui/CMakeFiles/opencv_highgui.dir/build.make:78: modules/highgui/qrc_window_QT.cpp] Error 1
#9 130.5 make[1]: *** [CMakeFiles/Makefile2:1684: modules/highgui/CMakeFiles/opencv_highgui.dir/all] Error 2
#9 130.5 make: *** [Makefile:163: all] Error 2

我尝试在git clone之后停止构建，以查看文件files_Qt/Milky/48/28.png是否存在于容器中，它是否存在。此外，如果我从容器中的交互式shell开始编译过程，编译过程就会成功。

因此，编译似乎只有在它是坞构建的一部分时才会失败。

有没有人知道有关buildkit如何工作的更多细节，以及这是否会对编译过程产生影响？

下面是构建命令和Dockerfile的一个最小示例：

DOCKER_BUILDKIT=1 docker build --no-cache --progress=plain -t "buildkit_error:latest" -f Dockerfile .

FROM ubuntu:20.04

WORKDIR /

# Setup apt repositories
RUN \
  apt update && \
  apt install -y --no-install-recommends \
      wget \
      software-properties-common && \
  add-apt-repository ppa:deadsnakes/ppa && \
  apt install -y --fix-broken && \
  apt update && \
  apt upgrade -y && \
  apt dist-upgrade -y && \
  apt remove -y python3 && \
  apt clean && \
  apt autoremove -y && \
  apt autoclean -y

# Install apt packages
# ORDER ALPHABETICALLY!
RUN \
  apt install -y --no-install-recommends \
      build-essential \
      clang-10 \
      cmake \
      cpio \
      git \
      libdrm-dev \
      libcairo2-dev \
      libomp-10-dev \
      llvm-10-dev \
      openssh-client \
      pkg-config \
      python3.6-dev \
      python3.6-distutils\
      python3.6-minimal \
      python3-pip \
      qt5-default

# Install pip dependencies
# ORDER ALPHABETICALLY!
RUN python3.6 -m pip install --no-cache-dir \
  numpy==1.16.1 \
  setuptools==59.6.0 \
  wheel==0.37.1

RUN \
    ln -sf /usr/bin/python3.6 /usr/bin/python3 && \
    ln -sf /usr/bin/python3 /usr/bin/python

ENV opencv=3.4.3
RUN git clone --branch $opencv --depth 1 https://github.com/opencv/opencv.git

RUN ls -al /opencv/modules/highgui/src/files_Qt/Milky/48

# build opencv from source
RUN \
  mkdir opencv/build && cd opencv/build && cmake -DBUILD_TIFF=ON \
  -DCMAKE_C_COMPILER=clang-10 \
  -DCMAKE_CXX_COMPILER=clang++-10 \
  -DENABLE_FAST_MATH=ON \
  -DCMAKE_BUILD_TYPE=Release \
  -DBUILD_opencv_java=OFF \
  -DWITH_CUDA=OFF \
  -DENABLE_CXX11=ON \
  -DWITH_OPENGL=ON \
  -DWITH_OPENCL=ON \
  -DWITH_IPP=ON \
  -DWITH_TBB=ON \
  -DWITH_EIGEN=ON \
  -DWITH_V4L=OFF \
  -DWITH_GTK=ON \
  -DWITH_GTK_2_X=ON \
  -DBUILD_PERF_TESTS=OFF \
  -DBUILD_opencv_apps=OFF \
  -DBUILD_JAVA=OFF \
  -DBUILD_PROTOBUF=OFF \
  -DBUILD_PACKAGE=OFF \
  -DBUILD_TESTS=OFF \
  -DBUILD_opencv=OFF \
  -DBUILD_opencv_dnn=OFF \
  -DBUILD_opencv_java_bindings_generator=OFF \
  -DBUILD_opencv_shape=OFF \
  -DBUILD_opencv_stitching=OFF \
  -DBUILD_opencv_superres=OFF \
  -DBUILD_opencv_ts=OFF \
  -DBUILD_opencv_video=OFF \
  -DBUILD_opencv_videoio=OFF \
  -DBUILD_opencv_videostab=OFF \
  -DBUILD_opencv_world=OFF \
  -DBUILD_opencv_ml=OFF \
  -DBUILD_opencv_photo=OFF \
  -DWITH_1394=OFF \
  -DWITH_FFMPEG=OFF \
  -DWITH_GSTREAMER=OFF \
  -DWITH_IMGCODEC_HDR=OFF \
  -DWITH_IMGCODEC_PXM=OFF \
  -DWITH_IMGCODEC_SUNRASTER=OFF \
  -DWITH_JASPER=OFF \
  -DWITH_OPENCVAMDBLAS=OFF \
  -DWITH_OPENCVAMDFFT=OFF \
  -DWITH_OPENEXR=OFF \
  -DWITH_OPENNI=OFF \
  -DWITH_OPENNI2=OFF \
  -DWITH_OPENVX=OFF \
  -DWITH_VTK=OFF \
  -DWITH_V4L=OFF \
  -DWITH_QUIRC=OFF \
  -DWITH_QT=ON \
  -DBUILD_opencv_calib3d=ON \
  -DBUILD_opencv_core=ON \
  -DBUILD_opencv_python3=ON \
  -DBUILD_opencv_flann=ON \
  -DBUILD_opencv_python_binding_generator=ON \
  -DBUILD_opencv_highgui=ON \
  -DBUILD_opencv_imgcodecs=ON \
  -DBUILD_opencv_features2d=ON \
  -DBUILD_opencv_imgproc=ON \
  -DWITH_OPENMP=ON \
  -DWITH_PNG=ON \
  -DWITH_HALIDE=OFF .. && \
  make -j6 && make install

Answer 1

经过一番调查，我终于偶然发现了一张票：https://gitlab.archlinux.org/archlinux/archlinux-docker/-/issues/32

这些评论给了我一个想法，即内核可能是问题所在。我对内核进行了升级，这似乎解决了问题。

希望这能对未来的其他人有所帮助。